Hatsukokoro Ryuhyo SG2 Damascus Rainbow Bunka 180mm

The Ryuhyo(流冰, Flowing Ice) is a line that looks familiar but feels different. At first glance, it carries the same elegant SG2 Damascus identity as the existing Saihyo line, but once in hand, the difference quickly becomes clear. The improved sharpening, smoother cutting feel, and compelling value have already made Ryuhyo one of the easiest recommendations in the intermediate to high-end Japanese knife market.

Now, the new Coated Series takes that familiar formula a step further. Available in striking Blue and Rainbow finishes — with Orange arriving in the future — this version adds a completely different visual personality to the already flowing Damascus pattern. Depending on the light, the coating shifts subtly across the blade surface, almost like reflected light moving across drifting ice. The finish feels modern and expressive without losing the refined aesthetic expected from Japanese kitchen knives.

Hatsukokoro's earlier Saihyo SG2 series has been around for quite some time, but one criticism was always the somewhat conservative grind and sharpening. The blade geometry featured a relatively standard flat grind with a polished sandblasted Damascus finish, and the thickness behind the edge was not particularly thin. While visually attractive, many knives in the same price range could outperform it in cutting feel and food release.

The Ryuhyo series seems to be Hatsukokoro’s direct answer to this issue. Not only does it come at a more approachable price point, but the cutting performance itself feels noticeably smoother and more refined. The geometry transitions more like a sabre/V-grind without a defined shinogi line, allowing food to glide naturally across the blade surface while preserving the uninterrupted flow of the Damascus pattern. Perhaps this flowing transition is exactly where the name “Ryuhyo” comes from.

The coated finish itself is achieved through electroplating, giving the blade its vibrant blue or rainbow appearance while maintaining good durability in daily use. Unlike painted coatings, the surface remains clean and metallic in feel, complementing the smooth grind underneath rather than masking it. As with most coated finishes, gentle hand-washing and avoiding abrasive materials is recommended to preserve the appearance over time.

The steel remains the trusted SG2 powdered steel, which many users would consider an ideal balance for both professional kitchens and serious home cooking. It offers excellent edge retention and wear resistance while remaining far less troublesome to sharpen or maintain compared to many ultra-hard stainless steels. Combined with the improved geometry, the Ryuhyo Coated Series positions itself extremely well: visually unique, high performing, and significantly more accessible than many fully hand-crafted SG2 knives.

In summary, the Ryuhyo Coated Series represents the continuing evolution of Hatsukokoro’s manufacturing and finishing techniques. While handcrafted knives will always have their place, it is exciting to see more production-oriented knives reaching this level of cutting performance, refinement, and visual creativity. The result is a knife that not only cuts smoothly, but also brings a sense of individuality and atmosphere to the kitchen — something that feels increasingly rare at this price point.